JP3943855B2 - Key engagement structure of shaft hole member and method of processing key engagement portion - Google Patents

Key engagement structure of shaft hole member and method of processing key engagement portion Download PDF

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Publication number
JP3943855B2
JP3943855B2 JP2001118436A JP2001118436A JP3943855B2 JP 3943855 B2 JP3943855 B2 JP 3943855B2 JP 2001118436 A JP2001118436 A JP 2001118436A JP 2001118436 A JP2001118436 A JP 2001118436A JP 3943855 B2 JP3943855 B2 JP 3943855B2
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Prior art keywords
shaft hole
key
shaft
hole member
hole
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JP2001118436A
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JP2002310176A (en
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章 山本
貴夫 重見
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Sumitomo Heavy Industries Ltd
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Sumitomo Heavy Industries Ltd
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Priority to JP2001105936A priority Critical patent/JP2002303311A/en
Application filed by Sumitomo Heavy Industries Ltd filed Critical Sumitomo Heavy Industries Ltd
Priority to JP2001118436A priority patent/JP3943855B2/en
Priority to TW091105774A priority patent/TWI235795B/en
Priority to KR1020020017919A priority patent/KR100814787B1/en
Priority to DE10214910A priority patent/DE10214910A1/en
Priority to CNB02105486XA priority patent/CN1260481C/en
Priority to US10/115,428 priority patent/US7237976B2/en
Publication of JP2002310176A publication Critical patent/JP2002310176A/en
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Publication of JP3943855B2 publication Critical patent/JP3943855B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/28—Grooving workpieces
    • B23C3/30—Milling straight grooves, e.g. keyways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0876—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with axial keys and no other radial clamping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/69—Redundant disconnection blocking means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/69—Redundant disconnection blocking means
    • F16B2200/71—Blocking disengagement of catches or keys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/10—Selectively engageable hub to shaft connection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/16—Joints and connections with adjunctive protector, broken parts retainer, repair, assembly or disassembly feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7018—Interfitted members including separably interposed key
    • Y10T403/7021—Axially extending
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/50—Planing
    • Y10T409/50082—Process
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/50—Planing
    • Y10T409/502624—Means for cutting groove
    • Y10T409/503116—Inside hollow work

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Springs (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Milling Processes (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、産業機器、輸送機器等に使用される軸穴部材のキーの係合構造及びキー係合部の加工方法に関する。
【０００２】
【従来の技術】
従来、軸及び該軸と嵌合する軸穴を有する軸穴部材にキー溝を形成し、該キー溝にキーを係合させることにより、該キーを介して軸と軸穴部材とを動力伝達可能に連結する手法が広く知られている。
【０００３】
軸穴が軸穴部材を軸方向に貫通している場合は、軸穴の軸方向の一端から他端へブローチ等の切削工具を挿通させることにより、軸穴部材にキー溝を容易に加工することができる。
【０００４】
これに対して軸方向他端側が閉塞されている非貫通の軸穴の場合は、軸穴にブローチ等を挿通させることができないので、軸穴部材のキー溝の加工は主にスロッタにより行われていた。
【０００５】
スロッタは、図６に示されるように、軸穴１００の内周側にバイト１０２を当接させて軸方向に往復させつつ、該バイト１０２を径方向外側に徐々に送ることにより、キー溝１０４を加工する工作機械である。
【０００６】
【発明が解決しようとする課題】
しかしながら、このスロッタによるキー溝加工は、キー溝１０４を完成するために、バイト１０２を軸方向に何回も往復させる必要があり、このため、作業効率が悪く、加工コストが高いという問題があった。
【０００７】
本発明は、このような問題点に鑑みてなされたものであって、たとえ軸方向他端側が閉塞されている非貫通の軸穴を有するような軸穴部材であっても、効率の良いキー係合部の加工を実現することができる軸穴部材のキーの係合構造及びキー係合部の加工方法を提供することを課題とする。
【０００８】
【課題を解決するための手段】
本発明は、軸と嵌合する軸穴を有し、該軸穴の内周側に形成されたキー係合部に係合するキーを介して前記軸と動力伝達可能に連結される軸穴部材のキーの係合構造において、前記軸穴部材に、軸方向両端部を残して外周部から前記軸穴にまで貫通する作業孔を設けると共に、この作業孔の径方向対称位置に、前記キーに係合するキー溝を形成したことにより、上記課題を解決したものである。
【０００９】
このように、キー係合部の径方向対称位置に作業孔を設けることにより、たとえ非貫通の軸穴を有する軸穴部材であっても、該作業孔から切削工具を挿入して軸方向に送ることによりキー係合部に容易に、作業効率良くキー溝を加工することができる。
【００１０】
一例を示すと、作業孔から径方向内側にエンドミルを挿入して該エンドミルを軸方向に送ることにより、キー係合部にキー溝を容易に加工することができる。
【００１１】
又、軸穴が貫通した軸穴部材についても、高価なブローチを用いることなくキー係合部にキー溝を加工することができ、特に生産数量が少なくブローチの減価償却費が問題とされるような場合、加工コストを大幅に低減することができる。
【００１２】
又、前記軸穴の軸方向の一端部の内周側に、前記キーを軸方向に挿通可能とする挿通溝を形成してもよい。
【００１３】
軸と軸穴部材とをキーを介して連結する場合、予め軸側にキーを係合してから軸とキーとを一体で軸穴部材に嵌合・連結することもある。
【００１４】
本発明の場合、キー溝の軸方向の両端部が閉じているが、上記挿通溝を形成することにより、予め軸側にキーを係合した軸と軸穴部材との連結が可能となる。
【００１５】
本発明を具体的に実現する方法としては、前記軸穴部材に、軸方向両端部を残して外周部から前記軸穴にまで貫通する作業孔を形成すると共に、この作業孔から径方向に切削工具を挿入して、該切削工具を軸方向に送ることにより、前記キーに係合するキー溝を形成するようにすればよい。
【００１６】
この場合、更に、前記軸穴部材に、外周部から前記軸穴まで前記切削工具を貫通させると共に、そのまま該切削工具を径方向対称位置にまで進入させて該切削工具を軸線方向に送ることにより、前記作業孔を形成する手順と、前記キー溝を形成する手順とを同時に実行するようにしてもよい。
【００１７】
そうすることで、軸穴部材のキー係合部の加工の作業効率を一層向上させることができる。
【００１８】
【発明の実施の形態】
以下、本発明の実施の形態の例を図面を参照して詳細に説明する。
【００１９】
図１〜図３に示されるように、軸穴部材１０は軸１２と嵌合する軸穴１４を有し、該軸穴１４の内周側に形成されたキー係合部１５に係合するキー１６を介して軸１２と動力伝達可能に連結されている。
【００２０】
本実施の形態の例に係る軸穴部材のキーの係合構造１８は、軸穴部材１０に、軸方向両端部１０Ａ及び１０Ｂを残して該軸穴部材１０の外周部１０Ｃから軸穴１４にまで貫通する作業孔２０を設けると共に、この作業孔２０の径方向対称位置に、キー１６に係合するキー溝２１を形成したことを特徴としている。
【００２１】
軸穴１４の軸方向の一端部１０Ａの内周側には、キー１６を軸方向に挿通可能とする断面円弧形状の挿通溝２２が形成されている。
【００２２】
なお、軸穴１４は軸方向の一端部１０Ａ側が開口し、他端部１０Ｂ側が閉塞されている。
【００２３】
又、軸１２には従来と同様のキー溝１２Ａが形成されている。
【００２４】
次に、軸穴部材のキーの係合構造１８の作用について説明する。
【００２５】
まず、軸穴部材のキーの係合構造１８におけるキー溝２１の加工方法について説明する。
【００２６】
キー溝２１は、軸穴部材１０に、軸方向両端部１０Ａ及び１０Ｂを残して外周部１０Ｃから軸穴１４まで貫通する作業孔２０を形成する手順を実行し、更に、この作業孔２０から径方向に切削工具を挿入して該切削工具を軸方向に送ることにより、キー溝２１を形成する手順を実行する軸穴部材のキー係合部の加工方法により加工可能とされている。
【００２７】
例えば、エンドミルを軸穴部材１０の外周部１０Ｃから軸穴１４まで貫通させてから軸方向に送ることにより、作業孔２０を形成することができる。更にこの作業孔２０から径方向対称位置までエンドミルを挿入して軸方向に送ることにより、キー溝２１を容易、且つ、迅速に形成することができる。
【００２８】
これにより、従来のスロッタによるキー溝加工に対して、キー溝加工作業の作業効率を大幅に向上させることができる。
【００２９】
一方、挿通溝２２も、軸方向に配置したエンドミルを軸穴部材１０の端部１０Ａに当接させて軸方向に送ることにより、容易、且つ、迅速に形成することができる。
【００３０】
即ち、軸穴部材のキーの係合構造１８によれば、軸穴部材を作業効率良く加工することができ、加工コストが低い。
【００３１】
次に、軸穴部材のキーの係合部構造１８における軸穴部材１０と軸１２との連結方法について説明する。
【００３２】
まず、キー１６を軸１２のキー溝１２Ａに係合し、これらキー１６及び軸１２を軸穴部材１０の軸穴１４に同軸的に接近・嵌合させる。
【００３３】
キー１６は挿通溝２２を挿通して軸穴部材１０のキー溝２１に係合される。
【００３４】
これにより、キー１６を介して軸穴部材１０と軸１２とが動力伝達可能に連結される。又、キー溝２１は径方向外側が閉塞されているので、キー１６が径方向外側に脱落することなく安定して保持される。
【００３５】
図４に、軸穴部材のキーの係合構造１８を減速機とモータとの連結に適用した例を示す。なお、軸穴部材１０は減速機２４の入力軸と一体とされ、軸１２はモータの出力軸とされている。
【００３６】
次に、本発明の実施の形態の第２例について説明する。
【００３７】
本実施の形態の第２例は、図５に示されるように、前記実施の形態の第１例に対して、作業孔２０をキー１６と係合可能なキー係合用貫通孔２６として使用すると共に、キー溝２１及びキー係合用貫通孔２６の双方において２つのキー１６及び２８を係合可能としたものである。
【００３８】
なお、軸穴部材１０の端部１０Ａとキー係合用貫通孔２６の間にも、キー２８を軸方向に挿通可能とする挿通溝３０が形成されている。
【００３９】
これにより、２つのキー１６及び２８を介して軸１２と軸穴部材１０とを連結することができ、回転力の伝達容量を増加させることができる。
【００４０】
この場合、キー係合用貫通孔２６からキー２８が径方向外側へ脱落することを確実に防止するためには、例えばキー係合用貫通孔２６を覆う蓋状、又はキー係合用貫通孔２６の周囲で軸穴部材１０に嵌着する止め輪状等のストッパを設けるとよい。
【００４１】
なお、前記実施の形態の第１例及び第２例において、挿通溝２２が軸穴部材１０に設けられているが、本発明はこれに限定されるものではなく、挿通溝２２のない軸穴部材としてもよい。
【００４２】
この場合、軸穴１４側からキー溝２１にキー１６を予め嵌合させてから、軸穴１４に軸１２を嵌合することにより、軸穴部材１０と軸１２とをキー１６を介して連結することができる。
【００４３】
尚、軸部材によっては、軸方向の両端部が閉じた孔形状のキー溝が形成されたタイプも存在する。予め軸穴部材側のキー溝にキーを装着してからこのような軸部材と軸穴部材とを嵌合しようとすると軸部材とキーとが干渉することとなり、軸部材と軸穴部材とを連結することができない。
【００４４】
一方、挿通溝２２が設けられていれば、このような両端部が閉じたキー溝が形成された軸部材であっても該軸部材側に予めキーを装着することにより、上記のように該軸部材と軸穴部材とを容易に連結することができる。
【００４５】
即ち挿通溝２２は、軸部材のタイプによらず、軸部材と軸穴部材との容易な連結を実現することができる。
【００４６】
又、前記実施の形態の第２例において、挿通溝３０のない軸穴部材としてもよい。この場合も、軸穴１４側からキー係合用貫通孔２６にキー２８を予め嵌合させてから、軸穴１４に軸１２を嵌合することにより軸穴部材１０と軸１２とをキー２８を介して連結することができる。
【００４７】
尚、軸穴部材１０の軸穴１４に軸１２を嵌合させた後に、キー係合用貫通孔２６の径方向外側からキー２８を挿入・係合してもよい。
【００４８】
又、前記実施の形態の第１例及び第２例において、軸穴部材１０と軸穴１４は軸方向他端が閉塞されているが、本発明はこれに限定されるものではなく、軸穴部材のキーの係合構造１８は軸穴が貫通した軸穴部材に対しても適用可能である。
【００４９】
軸穴が貫通している場合、軸穴にブローチを挿通することによりキー溝を効率良く形成することができるが、ブローチは高価であるため、生産数量が少ない場合には減価償却費が問題となる。
【００５０】
この場合、軸穴が貫通している軸穴部材に対しても軸穴部材のキーの係合構造１８を適用することにより、ブローチによらずにエンドミル等でキー溝を低コストで加工することができる。
【００５１】
又、前記実施の形態の第１例において、キー溝２１の加工方法として、エンドミルで作業孔２０を加工した後、更にエンドミルでキー溝２１を加工する方法が例示されているが、本発明はこれに限定されるものではなく、例えば、軸穴部材１０に、外周部１０Ｃから軸穴１４までエンドミル等の切削工具を貫通させると共に、そのまま該切削工具を径方向対称位置にまで進入させて該切削工具を軸方向に送ることにより、作業孔２０を形成する手順と、キー溝２１を形成する手順とを同時に実行するようにしてもよい。
【００５２】
このようにすることで軸穴部材のキー係合部の加工効率を一層向上させることができる。
【００５３】
この際、キー溝形成用の外径とこれよりも太い作業孔形成用の外径とを有する段付軸形状のエンドミル状の工具を製作して使用すれば、工具の剛性が高まり、それだけ安定した状態でキー溝を加工することができる。
【００５４】
【発明の効果】
以上説明したように、本発明によれば、非貫通の軸穴を有する軸穴部材に効率良くキー係合部を加工することが可能になるという優れた効果がもたらされる。
【図面の簡単な説明】
【図１】本発明の実施の形態の第１例に係る軸穴部材のキーの係合構造を示す断面図
【図２】同平面図
【図３】同側面図
【図４】同軸穴部材のキーの係合構造の減速機への適用例を示す断面図
【図５】本発明の実施の形態の第２例に係る軸穴部材のキーの係合構造を示す側面図
【図６】従来の軸穴部材のキーの係合構造を示す断面図
【符号の説明】
１０…軸穴部材
１０Ａ、１０Ｂ…端部
１０Ｃ…外周部
１２…軸
１４、１００…軸穴
１５…キー係合部
１６、２８…キー
１８…軸穴部材のキーの係合構造
２０…作業孔
２１、１０４…キー溝
２２、３０…挿通溝
２６…キー係合用貫通孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a key engagement structure for a shaft hole member used in industrial equipment, transportation equipment, and the like, and a method for processing a key engagement portion.
[0002]
[Prior art]
Conventionally, a key groove is formed in a shaft hole member having a shaft and a shaft hole that fits with the shaft, and a key is engaged with the key groove to transmit power between the shaft and the shaft hole member through the key. The method of connecting in a possible manner is widely known.
[0003]
When the shaft hole penetrates the shaft hole member in the axial direction, a cutting tool such as a broach is inserted from one end to the other end of the shaft hole in the axial direction, thereby easily machining the key groove in the shaft hole member. be able to.
[0004]
On the other hand, in the case of a non-through shaft hole whose other end in the axial direction is closed, a broach or the like cannot be inserted into the shaft hole. Therefore, the key groove of the shaft hole member is mainly processed by a slotter. It was.
[0005]
As shown in FIG. 6, the slotter gradually feeds the cutting tool 102 radially outward while bringing the cutting tool 102 into contact with the inner peripheral side of the shaft hole 100 and reciprocating in the axial direction. Is a machine tool for machining.
[0006]
[Problems to be solved by the invention]
However, the key slot machining by this slotter requires that the cutting tool 102 be reciprocated several times in the axial direction in order to complete the key groove 104, which causes a problem that work efficiency is low and machining cost is high. It was.
[0007]
The present invention has been made in view of such problems, and even if it is a shaft hole member having a non-through shaft hole in which the other axial end is closed, an efficient key is provided. It is an object of the present invention to provide a key engagement structure for a shaft hole member and a method for processing the key engagement portion, which can realize the processing of the engagement portion.
[0008]
[Means for Solving the Problems]
The present invention has a shaft hole that fits with a shaft, and is connected to the shaft so as to be able to transmit power via a key that engages with a key engaging portion formed on the inner peripheral side of the shaft hole. In the key engagement structure of the member, the shaft hole member is provided with a work hole penetrating from the outer peripheral portion to the shaft hole, leaving both end portions in the axial direction, and the key hole is provided at a radially symmetrical position of the work hole. The above-described problems are solved by forming a key groove that engages with the.
[0009]
In this way, by providing the working hole at the radially symmetric position of the key engaging part, even if the shaft hole member has a non-through shaft hole, the cutting tool is inserted through the work hole in the axial direction. By feeding, the key groove can be easily processed into the key engaging portion with high work efficiency.
[0010]
For example, the key groove can be easily machined in the key engaging portion by inserting an end mill radially inward from the working hole and feeding the end mill in the axial direction.
[0011]
In addition, the shaft hole member through which the shaft hole penetrates can be processed into a key groove in the key engaging portion without using an expensive broach, and the depreciation cost of the broach seems to be a problem especially because the production quantity is small. In this case, the processing cost can be greatly reduced.
[0012]
Further, an insertion groove that allows the key to be inserted in the axial direction may be formed on the inner peripheral side of one axial end portion of the shaft hole.
[0013]
When the shaft and the shaft hole member are connected through a key, the shaft and the key may be integrally fitted and connected to the shaft hole member after the key is previously engaged with the shaft side.
[0014]
In the case of the present invention, both ends of the key groove in the axial direction are closed. However, by forming the insertion groove, the shaft and the shaft hole member that are previously engaged with the key can be connected.
[0015]
As a specific method for realizing the present invention, a work hole that penetrates from the outer peripheral portion to the shaft hole is formed in the shaft hole member, leaving both end portions in the axial direction, and cutting is performed from the work hole in the radial direction. What is necessary is just to form the keyway engaged with the said key by inserting a tool and sending this cutting tool to an axial direction.
[0016]
In this case, the cutting tool is further passed through the shaft hole member from the outer peripheral portion to the shaft hole, and the cutting tool is advanced to a radially symmetric position as it is to send the cutting tool in the axial direction. The procedure for forming the working hole and the procedure for forming the keyway may be executed simultaneously.
[0017]
By doing so, the working efficiency of the process of the key engaging part of a shaft hole member can be improved further.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.
[0019]
As shown in FIGS. 1 to 3, the shaft hole member 10 has a shaft hole 14 that fits with the shaft 12, and engages with a key engagement portion 15 formed on the inner peripheral side of the shaft hole 14. It is connected to the shaft 12 via a key 16 so that power can be transmitted.
[0020]
The key hole engagement structure 18 of the shaft hole member according to the example of the present embodiment leaves the shaft hole member 10 from the outer peripheral portion 10C of the shaft hole member 10 to the shaft hole 14, leaving the axial end portions 10A and 10B. A working hole 20 that penetrates the working hole 20 is provided, and a key groove 21 that engages with the key 16 is formed at a radially symmetrical position of the working hole 20.
[0021]
An insertion groove 22 having an arc-shaped cross section that allows the key 16 to be inserted in the axial direction is formed on the inner peripheral side of the axial end portion 10A of the shaft hole 14.
[0022]
The shaft hole 14 is open on the one end 10A side in the axial direction and closed on the other end 10B side.
[0023]
The shaft 12 is formed with a keyway 12A similar to the conventional one.
[0024]
Next, the operation of the shaft hole member key engagement structure 18 will be described.
[0025]
First, a method of processing the key groove 21 in the key engagement structure 18 of the shaft hole member will be described.
[0026]
The key groove 21 executes a procedure for forming a work hole 20 penetrating from the outer peripheral portion 10C to the shaft hole 14 in the shaft hole member 10 while leaving both axial end portions 10A and 10B. By inserting the cutting tool in the direction and sending the cutting tool in the axial direction, the cutting can be performed by the processing method of the key engaging portion of the shaft hole member that executes the procedure of forming the key groove 21.
[0027]
For example, the work hole 20 can be formed by passing the end mill from the outer peripheral portion 10 </ b> C of the shaft hole member 10 to the shaft hole 14 and then feeding it in the axial direction. Furthermore, the key groove 21 can be formed easily and quickly by inserting an end mill from the working hole 20 to the radially symmetric position and feeding it in the axial direction.
[0028]
As a result, the work efficiency of the key groove machining operation can be greatly improved as compared with the key groove machining by the conventional slotter.
[0029]
On the other hand, the insertion groove 22 can also be formed easily and quickly by feeding an end mill disposed in the axial direction in contact with the end portion 10A of the shaft hole member 10 in the axial direction.
[0030]
That is, according to the key hole engagement structure 18 of the shaft hole member, the shaft hole member can be processed with high work efficiency, and the processing cost is low.
[0031]
Next, a method of connecting the shaft hole member 10 and the shaft 12 in the key engaging portion structure 18 of the shaft hole member will be described.
[0032]
First, the key 16 is engaged with the key groove 12 </ b> A of the shaft 12, and the key 16 and the shaft 12 are coaxially approached and fitted to the shaft hole 14 of the shaft hole member 10.
[0033]
The key 16 is inserted through the insertion groove 22 and engaged with the key groove 21 of the shaft hole member 10.
[0034]
As a result, the shaft hole member 10 and the shaft 12 are coupled via the key 16 so that power can be transmitted. Further, since the key groove 21 is closed on the radially outer side, the key 16 is stably held without dropping off on the radially outer side.
[0035]
FIG. 4 shows an example in which the key engagement structure 18 of the shaft hole member is applied to the connection between the speed reducer and the motor. The shaft hole member 10 is integrated with the input shaft of the speed reducer 24, and the shaft 12 is an output shaft of the motor.
[0036]
Next, a second example of the embodiment of the present invention will be described.
[0037]
As shown in FIG. 5, the second example of the present embodiment uses the working hole 20 as a key engagement through hole 26 that can be engaged with the key 16 as compared to the first example of the embodiment. In addition, the two keys 16 and 28 can be engaged in both the key groove 21 and the key engagement through hole 26.
[0038]
An insertion groove 30 that allows the key 28 to be inserted in the axial direction is also formed between the end 10 </ b> A of the shaft hole member 10 and the key engagement through hole 26.
[0039]
Thereby, the shaft 12 and the shaft hole member 10 can be connected via the two keys 16 and 28, and the transmission capacity of the rotational force can be increased.
[0040]
In this case, in order to reliably prevent the key 28 from falling off from the key engagement through hole 26 in the radial direction, for example, a lid shape covering the key engagement through hole 26 or around the key engagement through hole 26 It is preferable to provide a stopper such as a retaining ring that fits into the shaft hole member 10.
[0041]
In the first example and the second example of the embodiment, the insertion groove 22 is provided in the shaft hole member 10, but the present invention is not limited to this, and the shaft hole without the insertion groove 22 is provided. It is good also as a member.
[0042]
In this case, the key 16 is fitted in the key groove 21 in advance from the shaft hole 14 side, and then the shaft 12 is fitted in the shaft hole 14, thereby connecting the shaft hole member 10 and the shaft 12 via the key 16. can do.
[0043]
Some shaft members include a key groove having a hole shape in which both end portions in the axial direction are closed. If a key is mounted in the keyhole on the shaft hole member side in advance and an attempt is made to fit such a shaft member and the shaft hole member, the shaft member and the key will interfere with each other. Cannot be consolidated.
[0044]
On the other hand, if the insertion groove 22 is provided, even if the shaft member is formed with such a key groove closed at both ends, by attaching the key to the shaft member side in advance, The shaft member and the shaft hole member can be easily connected.
[0045]
That is, the insertion groove 22 can realize easy connection between the shaft member and the shaft hole member regardless of the type of the shaft member.
[0046]
In the second example of the embodiment, a shaft hole member without the insertion groove 30 may be used. In this case as well, the key 28 is fitted in advance to the key engagement through hole 26 from the shaft hole 14 side, and then the shaft 12 is fitted into the shaft hole 14 so that the shaft hole member 10 and the shaft 12 are connected to the key 28. Can be connected to each other.
[0047]
The key 28 may be inserted and engaged from the radially outer side of the key engagement through hole 26 after the shaft 12 is fitted into the shaft hole 14 of the shaft hole member 10.
[0048]
In the first and second examples of the embodiment, the shaft hole member 10 and the shaft hole 14 are closed at the other end in the axial direction, but the present invention is not limited to this, and the shaft hole The member key engagement structure 18 can also be applied to a shaft hole member through which the shaft hole penetrates.
[0049]
If the shaft hole is penetrated, the keyway can be efficiently formed by inserting the broach into the shaft hole, but since the broach is expensive, depreciation costs are a problem when the production quantity is small. Become.
[0050]
In this case, by applying the key engagement structure 18 of the shaft hole member to the shaft hole member through which the shaft hole passes, the key groove can be processed at low cost by an end mill or the like without using the broach. Can do.
[0051]
Further, in the first example of the embodiment, as a method of processing the key groove 21, a method of processing the key groove 21 by the end mill after processing the work hole 20 by the end mill is illustrated. However, the present invention is not limited to this. For example, a cutting tool such as an end mill is passed through the shaft hole member 10 from the outer peripheral portion 10C to the shaft hole 14, and the cutting tool is directly advanced to a radially symmetric position. You may make it perform simultaneously the procedure which forms the working hole 20, and the procedure which forms the keyway 21 by sending a cutting tool to an axial direction.
[0052]
By doing in this way, the processing efficiency of the key engaging part of a shaft hole member can be improved further.
[0053]
At this time, if a stepped shaft-shaped end mill-shaped tool having an outer diameter for forming a keyway and an outer diameter for forming a work hole larger than this is manufactured and used, the rigidity of the tool is increased and the stability is increased accordingly. In this state, the keyway can be processed.
[0054]
【The invention's effect】
As described above, according to the present invention, there is an excellent effect that it is possible to efficiently process the key engaging portion in the shaft hole member having the non-through shaft hole.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a key engagement structure of a shaft hole member according to a first example of an embodiment of the present invention. FIG. 2 is a plan view. FIG. 3 is a side view. Sectional drawing which shows the example of application to the reduction gear of the key engagement structure of FIG. 5 is a side view which shows the key engagement structure of the shaft hole member which concerns on 2nd example of embodiment of this invention. Sectional drawing which shows the key engagement structure of the conventional shaft hole member
DESCRIPTION OF SYMBOLS 10 ... Shaft hole member 10A, 10B ... End part 10C ... Outer peripheral part 12 ... Shaft 14, 100 ... Shaft hole 15 ... Key engagement part 16, 28 ... Key 18 ... Key engagement structure 20 of shaft hole member ... Work hole 21, 104 ... key grooves 22, 30 ... insertion grooves 26 ... key engagement through holes

Claims (4)

軸と嵌合する軸穴を有し、該軸穴の内周側に形成されたキー係合部に係合するキーを介して前記軸と動力伝達可能に連結される軸穴部材のキーの係合構造において、
前記軸穴部材に、軸方向両端部を残して外周部から前記軸穴にまで貫通する作業孔を設けると共に、この作業孔の径方向対称位置に、前記キーに係合するキー溝を形成した
ことを特徴とする軸穴部材のキーの係合構造。A shaft hole member that has a shaft hole that fits with the shaft, and that is coupled to the shaft so as to be able to transmit power through a key that engages with a key engagement portion formed on the inner peripheral side of the shaft hole. In the engagement structure,
The shaft hole member is provided with a work hole that penetrates from the outer peripheral portion to the shaft hole, leaving both axial ends, and a key groove that engages with the key is formed at a radially symmetric position of the work hole. An engagement structure for a key of a shaft hole member, characterized by the above. 請求項１において、
前記軸穴の軸方向の一端部の内周側に、前記キーを軸方向に挿通可能とする挿通溝を形成した
ことを特徴とする軸穴部材のキーの係合構造。In claim 1,
An engagement structure for a key of a shaft hole member, wherein an insertion groove for allowing the key to be inserted in the axial direction is formed on an inner peripheral side of one axial end portion of the shaft hole. 軸と嵌合する軸穴を有し、該軸穴の内周側に形成されたキー係合部に係合するキーを介して前記軸と動力伝達可能に連結される軸穴部材のキーの係合部の加工方法において、
前記軸穴部材に、軸方向両端部を残して外周部から前記軸穴にまで貫通する作業孔を形成する手順と、
この作業孔から径方向に切削工具を挿入して、該切削工具を軸方向に送ることにより、前記キーに係合するキー溝を形成する手順と、を含んでなる
ことを特徴とする軸穴部材のキー係合部の加工方法。A shaft hole member that has a shaft hole that fits with the shaft, and that is coupled to the shaft so as to be able to transmit power through a key that engages with a key engagement portion formed on the inner peripheral side of the shaft hole. In the method of processing the engaging portion,
A procedure for forming a working hole penetrating from the outer peripheral portion to the shaft hole, leaving both axial ends in the shaft hole member;
A shaft hole comprising: a step of inserting a cutting tool in a radial direction from the working hole and forming the key groove to be engaged with the key by feeding the cutting tool in the axial direction. A method for processing a key engaging portion of a member. 軸と嵌合する軸穴を有し、該軸穴の内周側に形成されたキー係合部に係合するキーを介して前記軸と動力伝達可能に連結される軸穴部材のキーの係合部の加工方法において、
前記軸穴部材に、外周部から前記軸穴まで切削工具を貫通させると共に、そのまま該切削工具を径方向対称位置にまで進入させて該切削工具を軸方向に送ることにより、軸方向両端部を残して前記外周部から前記軸穴にまで貫通する作業孔を形成する手順と、前記キーに係合するキー溝を形成する手順とを同時に実行する
ことを特徴とする軸穴部材のキー係合部の加工方法。A shaft hole member that has a shaft hole that fits with the shaft, and that is coupled to the shaft so as to be able to transmit power through a key that engages with a key engagement portion formed on the inner peripheral side of the shaft hole. In the method of processing the engaging portion,
By passing the cutting tool through the shaft hole member from the outer peripheral portion to the shaft hole, and directly entering the cutting tool to a radially symmetric position and feeding the cutting tool in the axial direction, both end portions in the axial direction are formed. The key engagement of the shaft hole member is characterized in that a procedure for forming a working hole that passes from the outer periphery to the shaft hole and a procedure for forming a key groove that engages with the key are simultaneously performed. Part processing method.
JP2001118436A 2001-04-04 2001-04-17 Key engagement structure of shaft hole member and method of processing key engagement portion Expired - Lifetime JP3943855B2 (en)

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JP2001105936A JP2002303311A (en) 2001-04-04 2001-04-04 Structure and working method of key engagement part of shaft hole member
JP2001118436A JP3943855B2 (en) 2001-04-04 2001-04-17 Key engagement structure of shaft hole member and method of processing key engagement portion
TW091105774A TWI235795B (en) 2001-04-04 2002-03-25 Method for forming key-engaging part of axial-hole member and key-engaging part structure
KR1020020017919A KR100814787B1 (en) 2001-04-04 2002-04-02 Forming method for key engaging part of shaft hole member and key engaging part
DE10214910A DE10214910A1 (en) 2001-04-04 2002-04-04 Method for forming a spring engagement part of a link with an axial hole and a spring engagement part structure
CNB02105486XA CN1260481C (en) 2001-04-04 2002-04-04 Formation method of shaft hole element key joint part and structure of key joint part
US10/115,428 US7237976B2 (en) 2001-04-04 2002-04-04 Key-engaging part structure

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JP2001118436A JP3943855B2 (en) 2001-04-04 2001-04-17 Key engagement structure of shaft hole member and method of processing key engagement portion

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KR20020079410A (en) 2002-10-19
DE10214910A1 (en) 2003-03-13
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TWI235795B (en) 2005-07-11
US20020150422A1 (en) 2002-10-17

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